from turtle import *
forward(200)
left(90)
fillcolor('red')
begin_fill()
circle(100,180)
end_fill()
left(90)
forward(100)
for i in range(17):
    left(10)
    pencolor('yellow')
    forward(100)
    backward(100)
left(100)
pensize(10)
pencolor('red')
forward(100)
hideturtle()
done()